CN1331636A

CN1331636A - Tubeless tire

Info

Publication number: CN1331636A
Application number: CN 99814856
Authority: CN
Inventors: 山际登志夫
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1998-12-21
Filing date: 1999-11-04
Publication date: 2002-01-16
Also published as: EP1162085A1; JP2000177307A; BR9916430A; WO2000037268A1; ID29023A

Abstract

A tubeless tire comprising a tire body 1 mounted at the outer circle of rim R. An annular air chamber C is directly formed between the inner surface 1f of a tire body 1 and a rim R. The tire body 1 is integrally provided with an air impermeable layer S for airtightly covering the inner surface 1f extending over the whole surface, which consists of an ethylene-vinyl alcohol copolymer.

Description

Tubeless tires

Invention field

The present invention relates to tire, particularly be installed in the tire body of wheel rim periphery, its inner face and the tubeless tires of taking turns intermarginal direct formation energy chamber.

Background technology

Above-mentioned tubeless tires needn't be installed between tire body and wheel rim and form the rubber inner tube that energy chamber is used, and simple structure widely adopts in the prior art.

But, in the above-mentioned existing tubeless tires,, pasting the difficult permeability material of the air that is called liner at the tire body inner face of rubber system, keeping in the tire, to be the air in the above-mentioned energy chamber, this liner normally adopts buttress rubber.

But rubber type of material generally all has some air permeabilities, so even the liner that adopts buttress rubber to constitute, As time goes on, the air in the tire leaks gradually, causes air-pressure drop low.

For this reason, the air that must check termly before, replenish in the tire is pressed, and its upkeep operation quite bothers.

The summary of the invention summary

The present invention makes in view of the above problems, and its purpose is to provide a kind of tubeless tires that addresses the above problem.

To achieve these goals, tubeless tires of the present invention, be contained in the tire body of wheel rim periphery, directly form the energy chamber of ring-type between its inner face and the wheel rim, it is characterized in that, on above-mentioned tire body, be provided with air integratedly and do not see through layer, this air does not see through layer and is made of the ethylene-vinyl alcohol copolymer that covers this inner body surface airtightly.

According to this structure, the air that is made of the ethylene-vinyl alcohol copolymer that covers the tire body inner face does not airtightly see through layer, can prevent the escape of air in the tire effectively, so, the air that will check termly needn't resembling before, replenish in the tire is pressed, and the maintenance of tire is rather simple.And, can for a long time the tire air be pressed and remain appropriate value, avoid under the low state of air-pressure drop, travelling, so, avoid causing the resistance of tire rolling to increase because of air-pressure drop is low, save the bunkerage that travels, suppress the eccentric wear of tire, improve tire life.

In addition, in above-mentioned structure, do not see through between layer and the tire body at above-mentioned air, folder is being established elastic body and adhesive resin, and above-mentioned elastic body is bonded in the inner face of tire body, and above-mentioned adhesive resin is bonded in this elastic body and this air does not see through between the layer.

According to this structure, the air that is made of the ethylene-vinyl alcohol copolymer that covers the tire body inner face does not airtightly see through layer, directly be not bonded in the tire body inner face, but bonding, so can improve gleyness to the tire body inner face by be bonded in the elastic body that this air do not see through on the layer securely with above-mentioned adhesive resin.

The accompanying drawing simple declaration

Fig. 1 be the 1st embodiment wheel want portion's cross-sectional view.

Fig. 2 is 2 amplification profile diagrams to the portion of looking of Fig. 1.

Fig. 3 is the diagram of curves of expression through number of days and the variation of tire air.

Fig. 4 is and the cooresponding amplification profile diagram of Fig. 2, represents the 2nd embodiment.

Fig. 5 is and the cooresponding amplification profile diagram of Fig. 2, represents the 3rd embodiment.

Fig. 6 is and the cooresponding amplification profile diagram of Fig. 2, represents the 4th embodiment.

Fig. 7 is and the cooresponding amplification profile diagram of Fig. 2, represents the 5th embodiment.

Fig. 8 is and the cooresponding amplification profile diagram of Fig. 2, represents the 6th embodiment.

The optimal morphology that carries out an invention

Below, with reference to the accompanying drawing illustrated embodiment, specify example of the present invention.

Among the 1st embodiment shown in Fig. 1,2, the wheel W of motor bike has the metallic wheel rim R of ring-type and fixedly is provided in the tubeless tires T of this wheel rim R outer circumferential side.The body 1 of this tubeless tires T, with common before tire similarly, mainly constitute with the rubber material, the interior all end 1a about it are in chimeric coupling recess Ra that is installed in the endless groove shape that is formed at wheel rim R periphery.

Between the inner face 1f and wheel rim R of above-mentioned tire body 1, but directly form the ring-type energy chamber C that filling keeps high pressure air.At the sidepiece of wheel rim R, be used for being located at the interior perimembranous of wheel rim R for the known open and close valve V of row's high pressure air to energy chamber C.

On above-mentioned body 1, be provided with the only saturating layer S of air integratedly, this air does not see through layer S and is made of the ethylene-vinyl alcohol copolymer that covers body 1 inner face 1f all sidedly airtightly.This ethylene-vinyl alcohol copolymer (Network ラレ society system for example, trade name: エバ-Le), be that the copolymer saponification with ethene and vinyl acetate forms.In the illustrated example, form it into the thick film like of 15～30 μ m, do not see through layer S as air.

The air that should be made of ethylene-vinyl alcohol copolymer does not see through a layer S, shown in following concrete example, along the inner face 1f of tire body 1 comprehensively, bonding closing directly or indirectly.

That is, comprehensive at the inner face of tire body 1 in the 1st embodiment shown in Figure 2, with common before tubeless tires similarly, layeredly overlapping the liner 2i that constitutes by buttress rubber, engaging with bonding or other juncture is one.On the surface of this liner 2i comprehensively, overlapping the above-mentioned air that is made of ethylene-vinyl alcohol copolymer does not see through a layer S, is bonded into one with bonding or other juncture.

The curve of Fig. 3, the tire A of expression the foregoing description and only adopt tire B as the liner 2i sealing material, that be made of buttress rubber (not having air not see through a layer S) presses in initial air to be 2kg/cm ²State, the variation that the tire air so that every day, speed per hour 95km/h respectively travelled 160km is pressed.According to this experimental result, there is not air not see through the tire B of layer S, through after a few days, air is pressed with institute to be reduced, and has air not see through the tire A of layer S, and pressing through month its air does not almost have variation yet.

According to the foregoing description, except adopting known anti-leak liner 2i, also set and have air better air barriers function, that above-mentioned ethylene-vinyl alcohol copolymer constitutes through a layer S, like this, can more effectively prevent the escape of air in the energy chamber C, so the air that needn't will check termly, replenish in the tire is pressed as before, can prolong maintenance cycle, upkeep operation is simple.

The 2nd embodiment shown in Figure 4 except the structure with the 1st embodiment, does not see through the surface (being the one side of energy chamber C side) of layer S at air, and also layeredly overlapping the liner 2o that is made of buttress rubber with bonding or other juncture, engages and is one.Being that air does not see through layer S, is the sandwich structure of holding under the arm between a pair of liner 2i, 2o.

Among this embodiment,, has better anti-escape of air effect than the 1st embodiment because multilayer liner 2i, 2o are arranged.In addition; the air that is made of ethylene-vinyl alcohol copolymer does not see through the surface of layer S; 2o is covered with by liner, is not exposed to energy chamber C, so; even it is film like that air does not see through layer S; when tire transports or when keeping, also can avoid other object and air not to see through a layer S and contact, and; above-mentioned liner 2o has the protective effect that air is not seen through layer S, simple structureization concurrently.

The 3rd embodiment shown in Figure 5, be in the tire of the 2nd embodiment, omitted the liner 2i of inboard (promptly with the inner face 1f of tire body 1 join side), the air that is made of ethylene-vinyl alcohol copolymer is not seen through layer S, directly overlap on the inner face 1f of tire body 1, engaging with bonding or other juncture is one.Therefore, among this embodiment, the air that is made of ethylene-vinyl alcohol copolymer is not covered with by the liner 2o in the outside through a layer S, is not exposed to energy chamber C, so, have the effect same with the 2nd embodiment.

The 4th embodiment shown in Figure 6 is in the tire of the 3rd embodiment, has omitted liner 2o, makes the air that is made of ethylene-vinyl alcohol copolymer not see through layer S and is exposed in the energy chamber C.Among this embodiment, owing to omitted the liner that constitutes by buttress rubber, so, can make the simple structureization of tire, cost-cutting.

Among the 5th embodiment shown in Figure 7, do not see through 1 of layer S and tire body at the air that is made of ethylene-vinyl alcohol copolymer, folder has been established the elastic body E and the adhesive resin A of stratiform.The elastic body E of stratiform is bonded on the inner face 1f of tire body 1, and adhesive resin A does not see through between layer S this elastic body E and air bonding securely.In the present embodiment, above-mentioned adhesive resin A, be adopt in polyolefin, import specific functional groups and obtain powerful gleyness polyolefin (Mitsui Chemicals society system, trade name: ア De マ-).In addition, above-mentioned elastic body E is the thermoplastic resin that the above-mentioned adhesive resin A of employing can be bonding, for example, the ethylene series thermoplastic elastomer (Mitsui Chemicals society system, trade name: ミㄢラストマ-).

In the Fabrication procedure of tire body 1, for example, do not see through on the one side of layer S forming membranaceous air, by above-mentioned adhesive resin A, bonding after the one side of above-mentioned elastic body E, again the another side of this elastic body E, be bonded on the tire body inner face 1f, like this, air just is not bonded on the tire body 1 through a layer S.

According to the 5th embodiment, the air that is made of ethylene-vinyl alcohol copolymer does not see through layer S, directly be not bonded on the tire body inner face 1f, but it is bonding by elastic body E (this elastic body E is bonded in air securely with above-mentioned adhesive resin A and does not see through on the layer S), so, directly be bonded in and compare when tire body inner face 1f goes up with this air not being seen through a layer S, can improve gleyness, be not easy to peel off from this inner face 1f to tire body inner face 1f.

The 6th embodiment shown in Figure 8, be in the tire of the 5th embodiment, do not see through on the another side (promptly being faced with the face of energy chamber C) of layer S at the air that constitutes by ethylene-vinyl alcohol copolymer, also by above-mentioned same adhesive resin A, bonding the elastic body E of stratiform, that is, this air does not see through a layer S, on its two sides respectively by adhesive resin A bonding inside and outside 2 layers of elastic body E, E, form the sandwich structure be clipped between inside and outside 2 layers of elastic body E, E.

According to the 6th embodiment, have the effect same, and because air does not see through two sides in the table of layer S, E is covered with integratedly by elastic body with the 5th embodiment, so, be film like even air does not see through a layer S, yet can not contact and damage with other object.

Above, embodiments of the invention have been described, but the present invention is not limited to these embodiment, within the scope of the invention, can make various other embodiment.For example, in the 1st～the 3rd embodiment, be not see through a layer S the liner of buttress rubber formation with by the air that ethylene-vinyl alcohol copolymer constitutes, 2 layers or 3 layers of ground lamination, but among the present invention, also can these liners and air are alternately stacked more than 4 layers through layer.

Industrial applicibility

As mentioned above, tubeless tyre of the present invention can be used for motor bike, also can be used for Other vehicle, such as big saloon car, truck or car etc.

Claims

1. tubeless tires, be contained in the tire body (1) of wheel rim (R) periphery, directly form the energy chamber (C) of ring-type between its inner face (1f) and the wheel rim (R), it is characterized in that, on above-mentioned tire body (1), be provided with air integratedly and do not see through layer (S), this air does not see through layer (S) and is made of the ethylene-vinyl alcohol copolymer that covers body (1) inner face (1f) airtightly.

2. tubeless tires as claimed in claim 1, it is characterized in that, do not see through between layer (S) and the tire body (1) at above-mentioned air, folder is being established elastic body (E) and adhesive resin (A), above-mentioned elastic body (E) is bonded in the inner face (1f) of tire body (1), and above-mentioned adhesive resin (A) is bonded in this elastic body (E) and this air does not see through between the layer (S).